Comparative species responses to boron on a Typic Tropaqualf in Northern Thailand

Abstract

The effect of boron (B) on peanut and soybean was examined in two omission and one B fertilizer rate trial on a Typic Tropaqualf in Northern Thailand. The B rate trial was combined with a comparison of the response of sunflower, green gram, black gram, wheat, and rice in addition to peanut and soybean grown in irrigated rice-based cropping sequences over two years.Omitting B induced the hollow heart symptom in 10% of peanut kernels with the incidence of hollow hearts closely related to B concentration in the kernels. Omission of B had no effect on the appearance of soybean seed or on the grain yield of either soybean or peanut.In the B rate experiment, omitting B depressed grain yield by 50% in sunflower and by 40% to 80% in black gram, induced B deficiency symptoms in green gram and the hollow heart symptom in peanut kernels, but had no significant effect on the grain yield of soybean, peanuts, rice, or wheat. B deficiency apparently depressed grain yield in black and green gram by delaying or inhibiting reproductive development thus reducing pod set.

Response of Pulse and Oilseed Crops to Boron Application: A Review

“…A reduction in seed yield of black gram up to 40-50 per cent as a result of boron deficiency in soils with hot water soluble boron content (HWS-B) of 0.12-0.14 mg B kg -1 has also been reported (Rerkasem et al, 1988). Similarly, in boron deficient soils of Thailand a reduction in yield of black gram has been reported upto 70 per cent and while in green gram by 21 per cent (Rerkasem, 1991).…”

Mineral constraints to nitrogen fixation

“…These observations may reflect the critical sensitivity of developing meristems to B deficiency and indicate nodule growth and development as the most sensitive phase of the symbiosis to B deficiency. In the light of recent work uncovering widespread B deficiency affecting some grain legumes in the tropics (Rerkasem et al, 1987) a thorough investigation would seem warranted of the B requirements for free-living rhizobia and for effects of B-deficiency on symbiotic development in grain legumes.…”

Response of two peanut (Arachis hypogaea L.) cultivars to boron and calcium

“…That, at high B, SK 38 yielded better than Tainan 9 but worse at low B, has important implications for the selection of peanut cultivars for soils in Thailand since there is substantial evidence of widespread B deficiency in peanut in northeastern (Keerati-Kasikorn et al, 1987; and northern Thailand (Netsangtip et al, 1987;Rerkasem et al, 1988). It suggests that the use of particular peanut cultivars by farmers needs to be closely matched to the B status of the soils where they will be planted.…”

“…In the work reported by the FAO, no micronutrient fertilizers were included with the basal nutrients. Subsequent studies have shown B deficiency is relatively widespread in Thailand (Keerati-Kasikorn et al, 1987;Netsangtip et al, 1987;Rerkasem et al, 1988), and application of B fertilizers to peanut crops increased seed yield, quality and size (Keerati-Kasikorn et al, 1987;Rerkasem et al, 1988). The present study, examines the responses of two peanut cultivars widely grown in northeast Thailand, Tainan 9 and SK 38, to increasing levels of B in the presence or absence of Ca treatments.…”